<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>h5语义化标签</title>
</head>

<body>
  <header>我是头部</header>
  <div class="header">我是头部</div>
  <footer>我是脚部</footer>
  <div class="footer">我是脚部</div>
  <aside>注释信息</aside>
</body>

</html>